1662501663 has 12 divisors (see below), whose sum is σ = 2505799920. Its totient is φ = 1060145856.

The previous prime is 1662501641. The next prime is 1662501671. The reversal of 1662501663 is 3661052661.

1662501663 is a `hidden beast` number, since 16 + 625 + 0 + 16 + 6 + 3 = 666.

It is not a de Polignac number, because 1662501663 - 2⁹ = 1662501151 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662501613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4015498 + ... + 4015911.

It is an arithmetic number, because the mean of its divisors is an integer number (208816660).

Almost surely, 2^1662501663 is an apocalyptic number.

1662501663 is a deficient number, since it is larger than the sum of its proper divisors (843298257).

1662501663 is a wasteful number, since it uses less digits than its factorization.

1662501663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8031438 (or 8031435 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1662501663 is about 40773.7864687596. The cubic root of 1662501663 is about 1184.6426460778.

The spelling of 1662501663 in words is "one billion, six hundred sixty-two million, five hundred one thousand, six hundred sixty-three".